本文分析中国北方6省(陕西、甘肃、宁夏、青海、新疆、内蒙)大肠癌根治标本3587例。结果表明:各省大肠癌大体和组织形态有一定差异似与癌组织的侵袭性及病人免疫反应不同有关。 This paper analyzes 3587 cases of colorectal cancers in 6 provinces in northern China (Shaanxi, Gansu, Ningxia, Qinghai, Xinjiang and Inner Mongolia). The results showed that there were some differences between the gross and histological forms of colorectal cancers in different provinces, which were related to the invasiveness of cancer tissues and different immune responses of patients.